Type-writing machine.



PATENTED OCT. 10, 1905.

A. BRANDL.

TYPE WRITING MACHINE.

APPLICATION FILED MAR.30,1905.

ADOLF BRANDL, OF MUNICH, GERMANY.

TYPE-WRlTlNG MACHINE.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed March 30, 1905- Serial No. 252,949.

To (1.7 I 11.41.0111, it may concern:

Be it known that I, ADOLF BRANDL, mechanic, a citizen of Germany, residing at Munich, Bavaria, Germany, have invented certain new and useful Improvements in Typeriting Machines; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to type-writing machines of the type-bar form in which the imprint is made not with the assistance of an ink-ribbon, but directly from the type, which are inked while in a position of rest by suitable ink-carrying pads.

It has been usual heretofore in machines of this character to provide a special pad for each of the type, and these pads are moved out of the way by the pressure of the upuardly-moving type. In the present invention, however, the type are grouped, and each group is provided with a pad, Which pads are moved not by the type themselves, but directly from the keys. By this arrangement the employment of an ink-pad common to a number of type is rendered possible, while the whole machine is simplified, cheapened, made more efficient, and a lighter stroke or touch secured.

In the accompanying drawings, the invention is illustrated as embodied in a type-bar machine, many of the parts not relating directly to the invention being omitted for the sake of clearness.

In the drawings, Figure 1 is a longitudinal section through the middle portion of the type-writer, and Fig. 2 is a cross-section on the line A B of Fig. 1.

The grouping of the type may be arranged differently to suit the exigencies of different makes of machines; but preferably, as shown in the present case, the type-bars are divided into four groups one in front, one to the rear, and one on each side. As the type-bars hang in a position of rest the type carried thereby occupy positions substantially in a circle in a horizontal plane, with the typefaces projecting toward the central portion. The ink-pads consist of plates bowed to present a curved surface corresponding to that of the typefaces and carrying an outer layer of felt or similar fabric impregnated with the ink. The pads a and 5, located at the front and rear, respectively, may be formed with perforated plates for the sake of lightness, care being taken that the type in a position of rest contact with the felt over the metal surface and not the cut-away portion. The side pads c and (Z are shown as formed of narrow imperforated plates upturned at the extremities. These pads are arranged to be easily removable and are each held in the upturned arms a, which are secured to a rock;

shaft 7", supported in a suitable manner-as, for instance, by a yoke g, secured by the rods h to the machine-bod y. A counterweight i is placed on the opposite side of the rock-shaft f and tends to hold the pad against the faces of its group of type.

In order that the pads may be removed out of the path of the ascending type during the operation of the machine, mechanism acting thereon and in turn operated by the keys is provided, as follows: A lever I: is arranged for each one of the pads, which lever is pivotally secured at l to a bar m, fastened to the machine-frame. The upper end of the lever it is provided with a friction-roll )1, which in the forward and rear pads lies againstadownwardly-extending plate 0, connected with the counterweight of those pads, and in the case of the side pads against an oblique surface 1) on the end of the counterweight.

A cross-bar q, fixed to the lever 7e intermediate its two ends, passes beneath the key-levers is, controlling its group of typebars. The key-levers controlling each grc up of type are provided with the usual keys If and with downwardly-extending fingers arranged in line with the cross-bars q of the respective levers which operate the pad belonging to the respective groups of type, and the description of the fingers belonging to the pad 6 (shown in Fig. 1) will suffice for all. Each finger has a lower beveled or inclined point which lies normally above and against lts cross-rod q, so that the downward pressure of the key pushes the rod to one side,and thereby operates the lever Zr, bearing with its frietion-roll n against the plate 0 and lifting the counterweight, thereby removing the pad 5 out of the path of the upwardly-ascending type. To avoid friction, each of the rods 1 may be provided with an antifriction-roll o immediately beneath and serving as a bearing for the fingers. It is also so arranged that the fingers r, s, and t, with their oblique surfaces,

shall lie in close contact with the cross-rods q or friction-rollso and that the lever ]c, with its roll it, shall lie in close contact against the surface 0 or p in order that immediately at the beginning of the down ward pressure of the keys a movement of the pad shall follow. The obliquity of the fingers 1- s t is so that the entire movement of the lever is, and consequently of the 9ads,shall be completed during the first downward movement of the keys. As ordinarily constructed there is a certain amount of play or lost motion between the key-lever and the type-bars, so that the key is depressed for a certain distance before the type-bar begins. to move. The range of this movement may be increased, if found desirable, so that the first initial movement of the key-lever will operate only to move the ink-pad and the rest of its travel be utilized for a movement of the type-bar, whereby the force required to operate the ink-pads and type-bars will be distributed throughout the stroke, and the power required to operate the machine will not be appreciably increased, if at all, and the touch will not be impaired. In fact, the gain due to the omission of the mechanism for feeding the ordinary ribbon will more than counterbalance the power consumed by the pad mechanism.

The pads are so arranged relative to the type and to each other that no interference can arise on account of the rapid succession of strokes on any number of keys or the same key, each pad being thrown out of the way of the type belonging to its group as the type ascends or resumes its position in front of the type after its descent.

In each yoke g a suitable set-screw w is provided, which serves as a stop for the counterweight vl, limiting its upward movement, and consequently the downward movement of its pad, so that the adjacent pads cannot intersect each others path and interfere in rapid operation. In the case of the front and rear pads 64 and Z) the adjustment is obtained by means of'the beveled point of the screw w, which lies upon the inclined face of the coun terweight 71, while in the side pads this adjustment is provided for by the eccentric head of the screw w. Either of these means can be applied to all of the pads, or the regulation may be provided for in other ways.

In order to regulate the pressure of the pads against the type, a ring 00 may be arranged behind the type-bars with set-screw y, by means of which the type can be pressed against the ink-pads or retracted from the same, as may be desired, or the adjustment between the key-lever, pads, and type-bars may be such that the pressure upon the keys will impart a very small initial movement to the type-bars, whereby the type will be pressed against the pad and inked and then the lever k brought into action to move the pads out of the path of the ascending type, it being noted that the relation of the shaft f, forming the fulcrum of the pad, is such that the pressure of the lever k uponthe counterweight will impart a very rapid movement of the pad, clearing the path of the type.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a type-Writer, the combination, with operating-keys,and groups of type-bars carrying type, of ink vpads one for each group resting normally against the type-faces, and means operated by the keys for moving said pads independently from before the type.

2. In a type-writer, the combination, with operating-keys, and type-bars carrying type and divided into four groups, of a corresponding number of type-pads resting normally against the type-faces and means operated by the keys of each group for moving the pad belonging to that group from before the respective type independently of the pads of the other groups.

3. In a type-writer, the combination, with operating-keys, and type-bars carrying type, of ink-pads pivotally supported adjacent to the type and normally resting against the typefaces, levers bearing against the pads and fingers carried by the key-levers and arranged to operate said levers to move the pads from before the type.

4. In a type-writer, the combination, with operating-keys, and type-bars carrying type, of ink-pads arranged to rest normally against the type-faces and means operated by the keys to first move the pads from before the type and then to lift the type to make an imprint.

5.- In a type-writer, the combination, with operating-keys, and type-bars carrying type, of ink-pads pivotally mounted adjacent to the type and arranged to rest normally against the type-faces, levers pivoted to the frame of the machine with one end bearing against the pads, downwardly-extending fingers carried by the key-levers and provided with beveled ends engaging with the first levers whereby downward pressure on the keys will operate the levers to remove the pads from before the type, and means for automatically returning the pads after the type has resumed its normal position.

6. In a type-writer, the combination, with operating-keys, and type-bars arranged in groups and carrying type, of a corresponding number of ink-pads arranged to rest normally one against the type-faces of each group, and means operated by the keys for first moving said pads from before the respective groups of type and then lifting the' particular. type to make the imprint.

7 In a type-writer, the combination, with operating-keys, and type-bars arranged in groups and carrying type, of ink-pads one for each group pivotally mounted adjacent to the type and resting normally against the type- IIO faces of its group, a counterweight for each pad, a lever mounted on the machine-frame and bearing with one end against the counterweight, a cross-rod carried by said lever, fingers projecting downwardly from the keylevers belonging to the group of type inked by said pad, said fingers having their lower end beveled and resting against the cross-rod whereby a downward pressure of any key belonging to said type group will operate at once to shift the lever and remove the pad from before the group of type, and a connection between the key-lever and the type to lift the particular type to make an imprint after the movement of the pad.

8. In a type-writer, the combination, with operatingkeys, and typebars arranged in groups and carrying type, of ink-pads corresponding in number to the groups of type and pivotally mounted adjacent to the type, means operated by the keys for moving said pads from before the type, and separate means for adjustably limiting the movement of the pads.

9. In atype-writer, the combination, with operating-keys, and type-bars arranged in groups and carrying type, of ink-pads corresponding in number to the groups of type-bars and pivotally mounted adjacent to the type and normally resting against the type-faces, means for adjusting the pressure between the pads and type, and means operated by the keys for moving said pads from before the respective groups of type.

10. In a type-writer, the combination, with operating-keys, and type-bars arranged in groups and carrying type, of ink-pads eorresponding in number to the groups of type and pivotally mounted adjacent to'the type and arranged to rest normally against the typefaces, counterweights carried by the pads, levers operated by the keys for moving said pads from before the respective groups of type, and set screws having eccentric heads for limiting the movement of the pads.

11. In atype-writer, the combination, with operating-keys, and type-bars arranged in groups and carrying type, of ink-pads corresponding in number to the groups of type and pivotally mounted adjacent to the type and arranged to rest normally against the type-faces,

a counterweight carried by the pad and maintaining pressure of the pad against the typefaces, means for adjusting the pressure of the type-faces against the pad, a lever pivoted to the machine frame with one end resting against the pad, a cross-rod carried by each lever, downwardly-projecting fingers carried by the key-levers belonging to the type inked by each pad and having beveled ends resting in engagement with the cross-rods whereby the initial downward movement of any keylever of that group will operate to move the pad from before the type, means for limiting the movement of the pad consisting of a setserew having an eccentric head, and a connection between the key-levers and the type-bars whereby the particular type will be lifted to make an imprint after the pad has been moved.

12. Ina typewriter, thecombination, with operating-keys, and type-bars arranged in groups and carrying type, of ink-pads one for each group pivotally supported beneath and to the rear of the type-faces of that group and normally resting against the same, and means operated by the keys for independently moving the pad of the particular group upon its pivotal support from before the type.

13. In a type-writer, the combination, with operating-keys, and swinging type-bars arranged in groups and carrying type, of acorresponding number of ink-pads pivotally sup ported beneath and to the rear of the typefaces and resting normally one against the type faces of its group, a lever arranged with one end bearing against the pad, a cross-rod car ried by said lever, fingers projecting downwardly from the key-levers belonging to the group of type inked by said pad, said fingers having beveled lower ends resting against the cross-rod and a connection between the keylevers and type-bars, whereby the depression of a key will first move the pad from the group of type and then lift the particular type to make an imprint.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

ADOLF BRANDL.

WVitnesses:

ULYSSES J. BYWATER, MATHILDE K. H ELD. 

